Alignment Method for MEMS under High Overload Conditions

Aiming at the problem of micro-inertial sensor alignment under high overload conditions, a new alignment method based on guidance information + spin signal decomposition is proposed in this paper. By deducing the four-element attitude theory, the attitude recursive calculation method is established to solve the problem of missile heading and initial pitch angle. In this paper, based on the phase identification and error compensation technology of double acceleration velocity measurement signal, recursive least squares algorithm, symmetrical double acceleration velocity meter configuration scheme and micro-inertial gyroscope speed signal are used to realize the rolling attitude acquisition technology based on periodic signal, and to achieve high dynamic fast alignment of guided projectile in the air. The accuracy level of horizontal alignment error less than 0.2°and heading error less than 0.5°is analyzed by simulation under the condition of high-speed rotation of the projectile body.